#include<iostream>
#include<string>
using namespace std;
int main()
{
	string a, b, c = "               ";
	cin >> a >> b;
	int n = 0;
	for (int i = 0; i < a.size(); i++) {
		c[n++] = a[i];
		c[n++] = b[i];
	}
	cout << c << endl;
	/*for (int i = 0; i < a.size(); i++) {
		c[n * 2] = a[i];
		n++;
	}
	n = 0;
	for (int i = 0; i < b.size(); i++) {
		c[n * 2 + 1] = b[i];
		n++;
	}
	cout << c << endl;*/
	return 0;
}